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The porosity, permeability and restructuring of heterogeneous filter cakes

journal contribution
posted on 09.09.2010 by Kuhan Chellappah, Steve Tarleton, Richard J. Wakeman
The constant pressure filtration characteristics of cellulose fibers, titania (rutile) and mixtures of the two were studied using an automated filtration apparatus. With filtrations at 450 kPa, the average permeability (kav) for pure fiber and rutile were approximately 3.2 × 10–17 and 1.3 × 10–16 m2, respectively, with the variation of kav with fiber fraction showing a maximum. Similar trends were observed at filtration pressures of 150 and 600 kPa. The porosities (ϵav) of filter cakes formed from pure fiber and rutile suspensions were approximately 0.75 and 0.6, respectively. Interparticle penetration and additive porosity models were applied to the porosity data, and the additive porosity model appeared to better represent the experimental data. Also, the results obtained suggest that abrupt transitions in cake structure occur part way through some filtrations, resulting in anomalous filtration behavior.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Chemical Engineering

Citation

CHELLAPPAH, K., TARLETON, E.S. and WAKEMAN, R.J., 2010. The porosity, permameability and restructuring of heterogeneous filter cakes. Chemical Engineering and Technology, 33 (8), pp.1283-1289.

Publisher

© Wiley

Version

NA (Not Applicable or Unknown)

Publication date

2010

Notes

This item is closed access.

ISSN

1521-4125

Language

en

Exports